Self-designed surfaces via single-co-crystallization of homopolymer and diblock copolymers in various growth conditions

Agbolaghi, Samira; Abbasi, Farhang; Abbaspoor, Saleheh; Alizadeh-Osgouei, M.

doi:10.1016/j.eurpolymj.2015.02.003

Cited by 19 publications

(16 citation statements)

References 24 publications

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“…Totally, in single-cocrystal growth systems there were three various surface morphologies divided into matrix-dispersed, intermediate and random morphologies. In matrix-disperse morphology [11], the domain size of disperses were detectable in matrix phase. The domain size of dispersed patches did not vary with crystallization temperature significantly.…”

Section: Resultsmentioning

confidence: 98%

“…The novelty of this work is developing of random and intermediate single-co-crystals. Previously, matrix-dispersed single-co-crystals were introduced and investigated [11].…”

Section: Resultsmentioning

confidence: 99%

“…Matrix-dispersed single-co-crystals and mixed-brushes in solution and melt state were previously reported by our research group [11][12][13]. They are also recalled here to make some comparisons.…”

Section: Introductionmentioning

confidence: 91%

“…When a long block such as atactic polystyrene (PS) chain is attached to a crystalline PEG chain, the big chain ends are excluded from the crystal lattice and they accumulate onto the crystalline substrate surface developing polymer brushes [7,9]. Polymer mixed-brushes having various surface morphologies, just like homo-brush single crystals, are composed of sandwich structure [10,11], i.e., a PEG nanolayer sandwiched between two amorphous nano-layers.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of polymer nano-brushes by self-seeding method and study of various morphologies by AFM

2015

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Polymer brushes due to their high sensitivity to environmental changes are the best and newest means for developing the responsive materials. Polymer nano-brushes consisting various surface morphologies and uniformly distributed amorphous grafted chains were synthesized via single-crystal growth procedure. Poly(ethylene glycol)-bpolystyrene (PEG-b-PS) and poly(ethylene glycol)-bpoly(methyl methacrylate) (PEG-b-PMMA) block copolymers were prepared by atom transfer radical polymerization (ATRP). On the basis of various height differences, phase regions were detectable through atomic force microscopy (AFM NanoscopeIII). The novelty of this work is developing and characterizing the random and intermediate single-co-crystals. Besides, some other sorts of brushcovered single crystals like homo-brush and matrix-dispersed mixed-brushes were involved just for comparing the distinct morphologies. The intermediate (neither matrixdispersed nor random) single-co-crystals were detectable through their thickness fluctuations in AFM height profiles. On the contrary, the random single-cocrystals were verified through comparing with their corresponding homopolymer and homo-brush single crystals. The growth fronts of (120), (240), (200) and (040) were detected by electron diffraction of transmission electron microscope.

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Section: Resultsmentioning

confidence: 98%

“…The novelty of this work is developing of random and intermediate single-co-crystals. Previously, matrix-dispersed single-co-crystals were introduced and investigated [11].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Synthesis of polymer nano-brushes by self-seeding method and study of various morphologies by AFM

2015

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“…Nascent lateral habits of solution-grown single crystals [42], surface-patterned single crystals [43][44][45][46][47], and conductive-dielectric-conductive single crystals [48][49][50] have also been reported.…”

Section: Introductionmentioning

confidence: 95%

Fine fibrillar and rectangular/hexagonal ordered grains of poly(3-hexyl thiophene) and poly(ethylene glycol) developed by seeding technique

et al. 2016

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The fibrillar poly(3-hexyl thiophene) single crystals were prepared from dilute solutions of toluene, xylene, and anisole (0.01 wt%), and were investigated from the perspective of structural properties. Next, the rectangular and hexagonal poly(ethylene glycol) single crystals were developed from the dilute solutions and molten thin polymer films. The developing methodology used for all growth systems was self-seeding. The dimensions of fibrillar and rectangular/hexagonal single crystals ranged from several nanometers to some microns. Random single-co-crystals were also grown from dilute solution (0.018 wt% in amyl acetate) of crystalline-amorphous diblock copolymers and homopolymers. The small-angle X-ray scattering, grazing incidence wide-angle X-ray scattering, and atomic force microscopy analyses were employed to characterize prepared grained samples. The incident X-ray experiments demonstrated highly ordered and lamellar crystalline structures.

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High‐Quality Nano/Micro Hairy Single Crystals Developed from Poly(3‐hexylthiophene)‐Based Conductive–Dielectric Block Copolymers Having Flat‐on and Edge‐on Orientations

Zenoozi

Agbolaghi

Gheybi

et al. 2017

Macro Chemistry & Physics

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Highly uniform and conductive single crystals of poly(3‐hexylthiophene) (P3HT)‐based homo and block copolymers with the end coily blocks of polystyrene, poly(methyl methacrylate), and poly(ethylene glycol) are developed using self‐seeding method from varied quality solvents. Edge‐on and flat‐on orientations are detected depending on the thickness and width of single crystals. Coily blocks are excluded from the P3HT crystalline structures, leading to brush‐like or hairy regions on surface of grown single crystals in the longitude of P3HT chains. The larger single crystals possessing flat‐on orientation are obtained from weaker solvents at higher seeding temperatures. The longer P3HT chains are folded, however, the shorter backbones are laminated on each other. The highest backbone lamination occurs for homo‐P3HT7150 (Mn of P3HT = 7150 g mol−1) single crystals grown at 20 °C from anisole, the weakest employed solvent. In contract, highly ordered and folded hairy single crystals are acquired from better solvents and high molecular weight P3HTs. In these conditions, the crystallographic features of the hairy block copolymer single crystals are similar to those of nonhairy homo‐P3HT ones. The coily brush‐covered P3HT48 800 single crystals have more foldings compared to the homo‐P3HT48 800 ones, whereas only two laminated backbones in shorter P3HT blocks are detected.

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Self-designed surfaces via single-co-crystallization of homopolymer and diblock copolymers in various growth conditions

Cited by 19 publications

References 24 publications

Synthesis of polymer nano-brushes by self-seeding method and study of various morphologies by AFM

Synthesis of polymer nano-brushes by self-seeding method and study of various morphologies by AFM

Fine fibrillar and rectangular/hexagonal ordered grains of poly(3-hexyl thiophene) and poly(ethylene glycol) developed by seeding technique

High‐Quality Nano/Micro Hairy Single Crystals Developed from Poly(3‐hexylthiophene)‐Based Conductive–Dielectric Block Copolymers Having Flat‐on and Edge‐on Orientations

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